Machine for treating road-building material



9 6 9 2 3 6, l L A T E R E N R O H B E 7. 2 9 l 1,. 2 e n u J MACHINE FOR TREATING ROAD BUILDING MATERIAL Filed March 5. 1923 2 sheetw-Shegt l nve'no'cd Horner nd Earl B Zafageie Holi d June 927.

2l E. a. HoRNr-:R ET AL MACHINE FOR TREATING ROAD BUILING MATERIAL 2 Sheets-Sheet 2 Filed March 5. 1925 ma w, wwrM 8l n0 rH o wd @m a. @L Md mw Patented .luney 21, 1927-.

7 `UNITED STATES,

1,632,969' lPiiiisili oFFical naar. n. nomina AND LAFAYETTE HoLT, or BURLINGTON, NORTH CAROLINA.

MACHINE FOB TREATDJ'G ROAD-BUILDING MATERIAL.

applicateur in ea umn s, 192s. semi No. 622,994.

The present invention relates to a road making machine, and aims to provide a novel and improved apparatus for treating' the dirt at the surface of a road to produce a desirable finished surface as the machine advances along the road.

Another ob]ect is the provision of such a -the heat given off during the treatment of.

the dirt, for keeping the roller .or packing means and also a tank of tarvia or other surfacing solution warm, in order that 'the `roller or packing means can be kept warm to better compress the dirt, and in order that the tarvia or surfacing solution can be kept warm so as to flow freely to be sprayed on the layer of packed or compressed dirt.

The invention also has for an object to improve themachine generally in its construction and details, to enhance the utility and eiiiciency thereof.

With the fore oing and vother ob'ects in view, which will e apparent as the escription proceeds, the invention resides in the construction and arrangement of parts, as hereinafter described and claimed, it being understood that changes can be made wit-hin the scope of what is claimed, without departing-.from the spirit of the invention'.

The invention is illustrated in the accompanying drawings, wherein Fig. 1 is a` side elevation of the improved machine.

Fig. 2 is a plan being brokenaway.

Fig. 3 isa vertical section on the line 3--3 -O Fig. 2. l

Fig. 4 is a fragmentary elevation showing the dirt loosening druin and adacent por tions on a slightly larger sca e than in Fig. 1.

The machine comprises a suitable frame 7 supported by the rear roller 8 and the front view thereof, portions steering roller or wheel 9. The roller 8 is of suitable width, according tothe width of the strip of road which is to be treated, and said roller provides means for'packing or compressing the dirt. The axle 10"of the roller 8 is journaled in bearings 11 secured to the frame.y is preferably smaller than the roller 8; and is used for supporting the forward end of the frame and for steering the machine.

The axle 12 of the roller or wheel 9 is mounted in an arch or fork 13 having a Vvertical shaft 14 journaled in the forward portion of the frame for an ling the roller or wheel 9 to steer the machine. The steering gear, as shown, includes a worm wheel 15 secured on the shaft 14 and meshing with a worm 16 secured on a transverse shaft 17 v journaled in pedestals or Ibearings 18 mounted on the frame. The shaft 17' has hand wheels 19 at opposite ends for convenience in angling the wheel or roller 9..

The front roller or wheel 9 The machine is self-propelled from a I transverse drive shaft 20 mounted on the frame and driven by a suitable engine 21. Cranks 22 are journaled to the frame 7 at opposite sides and are operatively connected with the shaft 2O to be driven therefrom,

andsaid cranks are connected by the connecting rods 23 with oscillatory arms 24 mounted loosely on the opposite' terminals 'of the axle 10.` The arms 24 carry pawls 25 engaging ratchet wheels 26 secured on the axle 10, whereby the oscillation of the arms 24 by the rotation of the cranks 22 will rotate the roller 8 for advancing the machine. The arms 24 and cranks 22 are preferably -so arranged that the arms24 move in opposite directions, to obtain a ractically continuous rotation of the rol er 8. The arms 24 have series of'apertures 27 for the connection of the rods 23 so as to change the amount of oscilla-tion of the arms 24, which'will regulate the gear ratio between the drive shaft 20 and roller 8.

The dirt loosening means comprises a drum 28 rotated between the rollers 8 and 9 with its axis also disposed transversely, and the drum 28 is of about the same length as the roller 8. The drum 28 is disposed below the frame for vertical movement, and has on its periphery outstanding blades 29 parallel with the axle or shaft 30 of the drum, and the blades at the bottom of the drum extend downwardly below the plane which istangent to the bottoms of the rollers 39,

8 and 9, whereby said blades 29 diginto the The drum or cylinder 28 is mounted for upward ielding movement, so as to ass over un ielding rocks and other obstructions. Thus, the axle 30 is journaled in bearings 31 slidable vertically in slotted guides 32 dependin from the frame 7, and said bearings are yie dingly de ressed to their normal lowermost positions y means of coiled springs 33. The springs 33 permit the bearings 314 andaxle 30 to move upwardly in order vthat the drum 28 can pass over an unyielding object. lhe drum 28 is driven from the shaft 20, by means of a sprocket wheel 34 secured on each end of theaxle 30 and conrectedby a sprocket chain 55 with the shaft 20, and although the shaft 30 is driven.l at each ena it may be driven from one end only, if desired.

A guard or shield 36.is suplported above the roller 28 to prevent thev oosened dirt being thrown upwardly away from the roller, inasmuch as the roller is rotated at a comparatively high speed in relation to the movement of the machine which is comparttively slow. I

In the rear of the lower portion of the drum 28 is -locatedan arcuate shield 37 past which the blades 29 move, and said shield 37 is carried by arms 38 secured to the ends of the shield and mounted loosely on the axle 30 of the drum 28 between the ends of the drum and the guides 32. Extending downwardly and rearwardly 'from the upper ed of the shield 37 is a' dellector 39 over w 'ch the loose dirt is thrown from the blades 29 -as they move rearwardly and downwardly with the drum 28, the 'drum being rotated reversely to the direction of rotation of the rollers 8 and 9,*cr counter clock-wise as seen in Figs. 1 and 4. The delector 39 directs the loose dirt back toward the road bed after being carried upwardly with the drum 28. The lower edge 4l of the shield 37 extends downwardly and forwardly under the drum 28- close to the sur! face of the road bed from, which the dirt has been removed by the drum 28, and should the shield 37 strike a rock or other nonyielding obstruction the shield can swing upwardly, inasmuch as the arms 38 extend downwardly and rearwardly so that the shield 37 trails in rear of the drum. The arms 38 normally seat on stops cr seats 40 carried by the lower end of the guides 32, to limit the downward movement of the shield, but permitting the shield to move upwardly in passing over obstructions.

The loose dirt which passes down from the delectdi 39 is intercepted by flames directed rearwardly under the defleetor 39 from a burner 42. Said burner il-2 is elongated and is disposed under the shield 37 and dellector and is"supplied`with fuel through pipes 43 connected to the ends thereof and extending along the arms 38 to move therewith, the burner 42 being secured to the shield 37 to move upwardly and downwardly therewith. The pipes 43 are.con nected by flexible couplings 44 adjacenbto the axle 30 with the depen ing branchesl45 of a fuel supply pipe 47, each branch 45 having a control valve 46 to regulate the supply-of fuel to the burner. A fuel tank Vor reservoir 48 is mounted on the frame from which the supply pipe 47 leads to carry the oil tothe burner, and a main control valve 49 is provided in y the i 47. -v

Oi 1s `also supplied from the tank 48 to the loose dirt on the 4roadbed inv rear of thev drum 28 and burner 42. Thus, one or more depending pipes 50 have pivotal or knuckle joints 51 with the suppl pipe 47, and have spray nozzles 52 at their lower ends for spra ing the oil on the loose dirtin'rear of the rum 28 and burner 42 and in advance of the roller 8. Each pi e 50 is 'preferably provided with a contro valve 53 for regulating the discharge of oil. The ipes 5G can be adjusted to extend downwar ly at diierent angles in order to apply the oil to the loose dirt at most elise-tive point between the drum 28 and roller 8.

A tank or reservoir 54 for holding tai-via, an asphalt solution or otherfroad surfacing li uid or semi-liquid, is disposed above the ro ler 8 and the solution is discharged through a jpipe 55 extending from the rear lower portion of the tank 54 and having a transversely elongated spray nozzle or head 56 to deliver the solution to the surface oii the rolled dirt, the pipe 55 having a valve 57 for controlling the flow of solution from the tank. The tank 54 is sup-ported by transverse beams 58, and the bottom oi the tank is spaced above and curved downwardly in rear of the upper ortion of the roller 8 to provide a s ace 59 etween the bottom ot the tank and t 1e top of the roller. I

In order to utilize the products of cont bustion and air heated by the flames. a j aeket 60 is disposed around und spaced from the tank 54 and roller 8, to provide the vertical space 61 between the walls of the tank and the jacket 60. The lower edges o' the jacket 60 extend down close to the surface of the road, and the upper portion of the jacket is open for the discharge of the products of combustion and heated air. The jacket 60 has a forwardly extending entrance for receiving the portion 62 under the fuel tank 48 provided with an inlet or re ceiving openingr 63 through which the products of combustion and heated air pass to strike the roller 8 and then pass through the spaces 59 and (il below the tank 54 and upwardly along the walls of the tank. The roller 8 is thus heated in order that it will lOl) lll@

not chill the dirt which is being packed by the roller, so that the rolling o the dirt is more effective. The tank 54 is also heated to keep the surfacing solution warm, which may be necessary to make the solution flow readily through the spray nozzle or head 56.

v In operation, the machine is propelled over the surface of the road to be treated, the

` flames.

road havin been graded previously so as to prepare 1t for treatment-by the machine. As the machine moves forwardly, the drum 28 being rotated will loosen and break up the dirt at the surface of the road to the :desired depth, the blades 29- working forwardly at the bottom of the drumto act on the dirt with a forward motion: The loosened dirt is carried upwardly by the blades 29 at the front of the drum 28 and rearwardly at the top of the drum. As the blades 29 move downwardly at the rear of the drum, the dirt is thrown on the deflector 39 and passes downwardly and rearnardly Jover said deflector.

The flames which are projected rearwardl from the burner 42 intercept the loose d1rt as it falls from the delector 39, such dirt passing through the .As a result, ve etable matter, in sects, and other combustigble foreign matter will be burned and destroyed,- so as to eliminate from the dirt any such foreign matter which might decay or deteriorate and thereby disintegrate the superficial layer 'of dirt produced by the machine. thereby heated thoroughly, each particle of dirt passing through the llames, and the loose dirt, while heated, is piled on the roadbed in rear of the drum 28 and in advance ol' the roller 8. Oil is sprayed on the loose dirt in rear of the drum 28 and burner 42, while the dirt is heated, thereby supporting combustion on the loose dirt to keep the dirt heated, and to also saturate the dirt with oil that is not consumed, in order that when the dirt is packed down there will be produced a hard layer on the road bed 71. The roller 8 pisses over the loose dirt while same is heated and saturated with oil, so

that the roller compresses or packs the dirt into a solid or homogeneous mass. The particles of dirt are baked and compressedtogether, so that the layer 70 will withstand the traffic conditions imposed thereon. The roller 8 in passing over and compressing the loose dirt, will also extinguish the flames rising from the loose dirt. The tarvia or other surfacing solution is sprayed on the layer 70 in rear of the roller 8, thereby providing the surface 72 on the layer 70 and also serving to bond the particles of the layer 70 together, inasmuch'as the solution being applied on the layer while hot and liquid will impregnate the layer 70'to some depth, thereby hardening the surface of the layer 70 and making same more homogeneous. T he roller 8 being heated will also re- The dirt is alsoA sult in the layer 70 being heated when itl receives the tarvia or other solution.

Having thus described the invention, what 4 roadbed as said rotary mem 'r is rotated,

and means for treating the dirt raised by said rotary member. f

2. A road making machine comprising a rotary memberl having meansthereon for engaging dirt in a roadbed and raising the dirt thereover and returnin same to the roadbed as said rotary mem er is rotated, and means arranged for directing flames through the dirt as the same is returned to the roadbed.

3. A road makin machine comprising means for loosening t e dirt from a road bed and raising the loosened dirt, a deflector over which the dirt is delivered from said means to return to the road bed, and a burner arranged to direct flames from under the deilector through the dirt.

4. A road making machine comprising a rotary member having means thereon for'Y engaging dirt in a roadbed and raising the dirt thereover and returnin same to the roadbed as said rotary mem er is rotated, means arranged for directing flames through the dirt as the same is returned to the roadbed, and means for packing down the dirt while still heated by the flames passed therethrou h.

' 5. road making machinecomprising a rotary lmember having means thereon for loosening the dirt from a road bed, raising the dirt thereover and returning the same to the road bed as said rotary member is rotated, and a k,burner in rear of the rotary. member for directing flames lrearwardly through the discharged' fromthe rotary l i 110 member.`

6. A road making machine comprising a rotary drum having means for loosening the dirt from a road bed and raising the dirt to discharge same in rear of the drum, a deilector over which the dirt is discharged from the drum, and av burner 'for directing flames rearwardly under the deflectcr to ass through the dirt as it returns tothe road ed.

7. A road making machine comprisin a drum havin means for loosening the irt from a road drum to discharge the dirt in rear of the drum, a delector in rear of the drum over which the dirt is discharged from the drum, a burner supported with the deector for directing flames through the dirt, and means for mounting the drum and deilector for upward yielding movement.

8. A road making machine comprising a drum having means for loosening the dirt and means for su from a road bed and raisin the dirt to discharge the dirtp'in rear of t e drum, an axle for the drum, means mounting said axle for upward yielding movement, a deflector' in rear of the drum over which the dirt is discharged, means supporting the deflector engagingthe axle for the upward swinging movement of the deflector, and a burner supported with the deflector to direct flames through the dirt.

9. A road making machine comprising means for' loosening. thel dirt from a road bed, means for directing flames through the loosened dirt, means for spraying oil on the loosened dirt in rear of the flames, and means for packing down the rloosened dirt after being sprayed with oil. l A

10. A road making machine comprisinT means for loosening the dirt from a road be means for packin down the loosened dirt,

Ejecting the loosened dirt to flames and for directing the products of combustion .toward the packingV means to heat said'means.

l1. A Aroad making machine comprising means for loosening the dirt roma road bed, a roller for packing the loosened dirt down in rearof said means, and means for directing flames rearwardly through the loosened I `dirt toward said roller so that the 4roller is heated by the products of combustion.

l2, A road making machine comprising Y,

-means for loosening the dirtfrom'a road bed means for packing the dirt down in rear of the dirt down, a tank for a surfacing solu-l tion above the roller, means for delivering the lsolution from the tank to the packed dirt in rea-r of the roller, means for subjecting the loosened dirt to flames between the first named means and roller, and a. jacket surrounding 'the tank and roller and having an inlet so arran ed as to receive the products of combustion rom the flames to pass said roller and tank for heating them.

14. `A road making machine comprising.

means for loosening the dirt from a road bed, means for packing the loosened dirt` in rear of said means, a tank, means for delivering a solution from the tank to the dirt, means for subjecting the. -loosened dirt to flames, and means for conducting the roducts of combustion from the flames' adjacent to the tank for heating the tank.`

l EARL B'. HORNER.

LAFAYETTE HOLT. 

